First you must read THE BREAKER as this contains a lot of information that will help you understand the problems Shioon is facing. I accidentally read this one first and had to go back because A) slightly confused on what was happening & B) THE BREAKER was a great read and gave me new insight and info on the sequel.
The story is fine but all it really is about is Shioon having to relearn to use his powers though it has taken an interesting turn as he may have found a way to fix his broken core. Kinda takes a History's Strongest Disciple approach as he has to train and work hard to regain skills although it is in my opinion much more serious.
The artwork always stuns me. Honestly i love the artwork and wouldn't change it. It got a 9 b/c i haven't seen anything anyone said is a 10 before so i would know if it was higher. Really takes you into the Manhwa and the scenes are great.
The characters are actually a bit worse then THE BREAKER. it's bad to compare them, but i think since it more focused on Shioon you don't get to see as much into the others although i think Jin-le Kwon is a great addition in this one. Unfortunately you don't see to far into the characters past ( Jin-le Kwon and Jae-kyu Kwon, grandpa are the exception as you'll see a major development from past experiences.) Shioon is a great focus be he somehow seems to have only one gear. Once he goes to do something nobody can stop him and makes him seem almost invincible at points and while i like it it seems like he will never lose.
OMG i loved this. You can really read this over and over in fact just writing this is making me want to reread it. You can't get tired of it b/c it really doesn't ever go into repeating patterns as the author has thrown in twists and different obstacles. Not saying you wont see him doing the same kick-ass moves it's just you cant get vored of them cause you see them so rarely.

Highly highly recommend you red if you want some action a lil bit of romance and love martial arts related stuff. Find yourself a nice cozy spot to read and sit back, relax, and enjoy.